package com.top.art.utils;

import org.apache.commons.lang3.RandomStringUtils;
import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicLong;

/**
 * @author zhubg
 * @title: GenerateCode
 * @projectName
 * @description: TODO 根据业务类型生成对应的业务编码
 * @date 2020/10/13-11:05
 */
@Component
public class GenerateCode {


    /**
     *
     * @param bussinessType 业务类型
     * @return
     */
    public String getGenerateCode(String bussinessType){
        SimpleDateFormat sf = new SimpleDateFormat("MMddHHmmssSSS");
        return bussinessType+sf.format(new Date());
    }

    /**
     *
     * 生成准考证编码
     * @return
     */
    public String getGenerateCode(){
        SimpleDateFormat sf = new SimpleDateFormat("MMddHHmmss");
        return sf.format(new Date());
    }

    public static void main(String[] args) {
//        String a= RandomStringUtils.random(8, "abcdefghijklmnopqrstuvwxyz1234567890");
//        System.out.println(a);
//        System.out.println(generateInviteCode());;
        System.out.println(gen8Num());
    }

    public static String[] chars36 = new String[] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
    public static String[] chars62 = new String[] { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };

    public static String generateInviteCode()
    {
        StringBuffer shortBuffer = new StringBuffer();
        String uuid = UUID.randomUUID().toString().replace("-", "");
        for (int i = 0; i < 8; i++)
        {
            String str = uuid.substring(i * 4, i * 4 + 4);
            int x = Integer.parseInt(str, 16);
            // 如果是 chars62,则是x%62
            shortBuffer.append(chars36[x % 36]);
        }
        return shortBuffer.toString();
    }

    public static String gen8Num(){
        AtomicLong atomicLong = new AtomicLong(-1);
        for (int i = 0; i < 1000000000; i++) {
            Long atLong = atomicLong.incrementAndGet();
            System.out.println(String.format("%08d", atLong));
//            return String.format("%08d", atLong);
        }
        return null;
    }


}
